| Standard |
Full Name |
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| ANSI |
American National Standards Institute |
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| API |
American Petroleum Institute |
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| ASME |
American Society of Mechanical Engineers |
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| ASTM |
ASTM International |
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| BSI |
British Standards Institution |
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| DIN |
Deutsches Institut für Normung |
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| EN |
European Standards |
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| GOST |
State Standards of Soviet |
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| JIS |
Japan Industrial Standards |
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| NF |
Norme Française |
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| Terms Used for Cold Pipes |
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| Old Term |
New Term |
Description |
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| + BK |
+ C |
Pipes that have not undergone heat treatment (hard and bright) after cold drawing |
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| + NBK |
+ N |
Pipes normalized under protective gas after cold drawing |
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| + GBK |
+ A |
Pipes annealed under gas after cold drawing |
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| + BKM |
+ CR 1 |
Pipes that have not been subjected to heat treatment but are suitable for final annealing |
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+ CR 2 |
Pipes that have not undergone heat treatment after welding and size calibration |
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| + BKW |
+ LC |
Pipes that have undergone a complementary cold drawing process with very little deformation after heat treatment (soft pipes) |
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| Main Terms Used for Seamless and Welded Pipes |
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| Abbreviation |
Full Form |
Description |
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| SRM |
Streech Reducing Mill |
Pipes produced by the drawing method |
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| ERW |
Electrical Resistance Welded |
Longitudinal Welded Pipes - Electric Resistance Welded |
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| SAW |
Spiral Welded |
Spiral Welded Pipes - Made using the submerged arc welding method |
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| PE |
Plain End |
Plain ended pipes |
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| PBE |
Plain Both Ends |
Pipes with plain ends on both sides |
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| PLE |
Plain Large End |
Pipe with a plain large end |
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| PSE |
Plain Small End |
Pipe with a plain small end |
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| BW |
Butt Weld |
Pipes with butt welding |
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| SW |
Socket Weld |
Pipes with socket welding |
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| BBE |
Beveled Both Ends |
Pipes with beveled ends on both sides |
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| BLE |
Beveled Large Ends |
Pipes with beveled large ends |
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| BSE |
Beveled Small Ends |
Pipes with beveled small ends |
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| THD |
Threaded |
Threaded pipes |
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| TBE |
Threaded Both Ends |
Pipes with threaded ends on both sides |
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| TLE |
Threaded Large End |
Pipe with a threaded large end |
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| TSE |
Threaded Small End |
Pipe with a threaded small end |
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| Schedule (SCH) Norm |
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| Nominal Diameter |
Thread Diameter (Inch) |
Outside Diameter (mm) |
SCH 20 |
SCH 30 |
SCH 40 |
SCH 60 |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 140 |
XXS |
| 1/8 |
10,3 |
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1,73 |
2,41 |
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| 1/4 |
13,7 |
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2,24 |
3,02 |
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| DN 10 |
3/8 |
17,1 |
2,31 |
3,2 |
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| DN 15 |
1/2 |
21,3 |
2,77 |
3,73 |
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4,78 |
7,47 |
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| DN 20 |
3/4 |
26,7 |
2,87 |
3,91 |
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5,56 |
7,82 |
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| DN 25 |
1 |
33,4 |
3,38 |
4,55 |
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6,35 |
9,09 |
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| DN 32 |
1 1/4 |
42,2 |
3,56 |
4,85 |
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6,35 |
9,7 |
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| DN 40 |
1 1/2 |
48,3 |
3,68 |
5,08 |
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7,14 |
10,16 |
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| DN 50 |
2 |
60,3 |
3,91 |
5,54 |
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8,74 |
11,07 |
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| DN 65 |
2 1/2 |
73 |
5,16 |
7,01 |
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9,52 |
14,02 |
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| DN 80 |
3 |
88,9 |
5,49 |
7,62 |
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11,13 |
15,24 |
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| DN 90 |
3 1/2 |
101,6 |
5,74 |
8,08 |
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| DN 100 |
4 |
114,3 |
6,02 |
8,56 |
11,13 |
13,49 |
17,12 |
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| DN 125 |
5 |
141,3 |
6,55 |
9,52 |
12,7 |
15,88 |
19,05 |
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| DN 150 |
6 |
168,3 |
7,11 |
10,97 |
14,27 |
18,26 |
21,95 |
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| DN 200 |
8 |
219,1 |
6,35 |
7,04 |
8,18 |
10,31 |
12,7 |
15,09 |
18,26 |
20,62 |
23 |
| DN 250 |
10 |
273 |
6,35 |
7,8 |
9,27 |
12,7 |
15,09 |
18,26 |
21,44 |
25,4 |
28,6 |
| DN 300 |
12 |
323,9 |
6,35 |
8,38 |
10,31 |
14,27 |
17,47 |
21,44 |
25,4 |
28,58 |
33,3 |
| DN 350 |
14 |
355,6 |
7,92 |
9,52 |
11,13 |
15,09 |
19,05 |
23,82 |
27,79 |
31,75 |
35,7 |
| DN 400 |
16 |
406,4 |
7,92 |
9,52 |
12,7 |
16,64 |
21,44 |
26,19 |
30,96 |
36,52 |
40,5 |
| DN 450 |
18 |
457,2 |
7,92 |
11,13 |
14,27 |
19,05 |
23,82 |
29,36 |
34,92 |
39,69 |
45,2 |
| DN 500 |
20 |
508 |
9,52 |
12,7 |
15,09 |
20,62 |
26,19 |
32,54 |
38,1 |
44,45 |
50 |
| DN 550 |
22 |
558,8 |
9,52 |
12,7 |
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22,22 |
28,6 |
34,92 |
41,28 |
47,62 |
54 |
| DN 600 |
24 |
609,6 |
9,52 |
14,27 |
17,48 |
24,61 |
30,96 |
38,89 |
46,02 |
52,3 |
59,5 |
